A/HRC/12/27 page 13 long-term perspectives.10 Principle 5 of the Rio Declaration on Environment and Development mandates all States and all people to cooperate in the essential task of eradicating poverty as an indispensable requirement for sustainable development, in order to decrease the disparities in standards of living and better meet the needs of the majority of the people of the world. 31. According to principle 27 of the Rio Declaration, States and people should cooperate in good faith and in a spirit of partnership in the fulfilment of the principles embodied in the Declaration and in the further development of international law in the field of sustainable development. The right to development and inter- and intra-generational equity are core elements of sustainable development. Sustainable development principles, also enshrined in treaties such as the Convention on Biological Diversity and the United Nations Framework Convention on Climate Change, integrate notions of fairness and equity. They imply obligations to all those within a generation, and also to those yet unborn, encompassing the idea of solidarity with humanity and its ecological habitat. According to principle 3 of the Rio Declaration, the right to development must be fulfilled so as to equitably meet developmental and environmental needs of present and future generations. D. Implementation of the right to development, the Millennium Development Goals and a global partnership for development 32. It has been stated that the ongoing efforts made for the right to development, especially by the open-ended Working Group on the Right to Development and the high-level task force on the implementation of the right to development, contribute to ensure that the Millennium Development Goals are achieved, and that the challenge for the international community is to mobilize political will and financial support, reorient trade and development priorities, build capacity and integrate partners of civil society.11 Both the attainment of the Millennium Development Goals and the realization of the right to development, essential to the eradication of poverty, require international solidarity and cooperation, especially as envisaged in Millennium Development Goal 8 on the global partnership for development. 33. The Millennium Development Goals, and the legal and policy measures taken to reach them are part of the substance of emerging legal norms related to third-party responsibility and the international duty to cooperate. This is especially so in the case of Goal 8, which seeks to promote an international partnership for development in areas, such as access to affordable medicines and technologies and cooperation to increase development assistance and to cancel the 10 I. M. Porras, “The Rio Declaration: a new basis for international cooperation”, in P. Sands, Greening International Law, Earthscan, London, 1993. 11 “The future of the right to development will largely depend on the degree to which governments are willing to address the practical obstacles of the implementation of the Millennium Development Goals. A successful attainment of the Millennium Development Goals will contribute to the process of implementation of the right to development - and vice-versa.” S. von Schorlemer, “The right to development and the UN development goals: critical perspectives”, in C. R. Kumar and D. K. Srivastava, Human Rights and Development: Law, Policy and Governance, City University of Hong Kong, 2006.